People have been running port injection on their FK8s for awhile now.
Check out SES on IG. They also have a port injection kit.
https://www.instagram.com/seselectronicssolutions?igsh=eGh2ZGZlMDFqdWxj
KTuner isn't supported for FL5 & DE5 platforms.
Spend the extra couple of $100s and get Hondata or COBB. There's a reason why the majority don't run the JB4 piggyback.
😂😂😂😂